Behind-the-scenes training diary of "Rion" after three months of intense conditioning within the underground sex organization "NEOBLACK." Fully brainwashed, she whispers, "From today for several days, please treat me as a flesh toilet and use me freely," as she happily performs acts like foot licking and full-body lip services to harden cock with ease, satisfying her boss like a morning routine. However, for Rion, who repeatedly orgasms, public training sessions are enforced—she's broken down completely with waves of toy torture. During blowjob service, ordinary sucking won't make him cum. Instead, extreme deep-throat play is demanded: cock thrust deep into her throat, drool forced out, pleasure only registered when penetration reaches the very back of her throat. Her ass is brutally spanked bright red by cruel men, drenched in repeated squirting orgasms, until finally, like a sex slave, she's used in a 4P by three men. A must-see portrayal of Rion, who finds ecstasy in suffering.